EteSync vs Tasks.org Server alt nono Calendarserver

A side-by-side comparison of two self-hosted calendar & contacts options — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up? Compare EteSync with Compare Tasks.org Server alt nono Calendarserver with

EteSync End-to-end encrypted sync for contacts and calendars VS TA Tasks.org Server alt nono Calendarserver Archived Standards-compliant calendar and scheduling server

Feature	EteSync	Tasks.org Server alt nono Calendarserver
Deploy effort	Under-an-hour setup	Read-the-docs project
Health score	20 · At risk	10 · At risk
Status	Actively maintained	Archived
Category	Calendar & Contacts	Calendar & Contacts
License	AGPL-3.0	Apache-2.0
Language	Python	Python
Setup difficulty	Medium	Hard
Min. RAM	256 MB	512 MB
Deployment	docker, bare-metal	bare-metal, source
GitHub stars	★ 1,770	★ 507
First released	2017	2007
Replaces	Google Calendar, iCloud	Google Calendar, Exchange

What are EteSync and Tasks.org Server alt nono Calendarserver?

EteSync

EteSync is a secure, end-to-end encrypted, and journaled solution for syncing contacts, calendars, and tasks. Data is encrypted on the client so the server never sees plaintext.

End-to-end encryption
Journaled change history
Android and iOS apps

Tasks.org Server alt nono Calendarserver

Calendar and Contacts Server is a CalDAV and CardDAV server originally developed by Apple. It provides shared calendaring, scheduling, and directory services for groups.

Originated at Apple
Group scheduling support
Standards-compliant CalDAV

EteSync vs Tasks.org Server alt nono Calendarserver: key differences

The biggest difference is maintenance: Tasks.org Server alt nono Calendarserver's repository is archived and no longer developed, while EteSync is actively maintained. Both projects are written in Python. Licensing differs — AGPL-3.0 for EteSync versus Apache-2.0 for Tasks.org Server alt nono Calendarserver. EteSync is the lighter option, starting around 256 MB of RAM against 512 MB for Tasks.org Server alt nono Calendarserver. Tasks.org Server alt nono Calendarserver is the more established project (first released 2007), while EteSync arrived in 2017. EteSync has the considerably larger community, at 1,770 GitHub stars versus 507. EteSync lists first-class Docker deployment; Tasks.org Server alt nono Calendarserver does not.

Why pick each one

Choose EteSync if…

Released under the AGPL-3.0 license
First-class Docker support for quick deployment
Active community (1.8k GitHub stars)
Written in Python

EteSync details

Choose Tasks.org Server alt nono Calendarserver if…

Released under the Apache-2.0 license
Written in Python
Lightweight — runs in 512 MB RAM

Tasks.org Server alt nono Calendarserver details

Frequently asked questions

Is EteSync or Tasks.org Server alt nono Calendarserver better?

EteSync is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Tasks.org Server alt nono Calendarserver if its specific feature set fits your needs better.

Are EteSync and Tasks.org Server alt nono Calendarserver free and open-source?

Yes. EteSync is licensed under AGPL-3.0 and Tasks.org Server alt nono Calendarserver under Apache-2.0. Both can be self-hosted at no software cost.

Can I run EteSync and Tasks.org Server alt nono Calendarserver with Docker?

EteSync: yes. Tasks.org Server alt nono Calendarserver: check the project docs for container support.

Which is lighter on resources, EteSync or Tasks.org Server alt nono Calendarserver?

EteSync has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for Tasks.org Server alt nono Calendarserver. Real-world usage depends on library size, user count, and enabled features.